Net and cable cutting attachment for submarine boats.



O. A. YOUNGREN.

NET AND CABLE CUTTING ATTACHMENT FOR SUBMARINE BOATS.

v APPLICATTON FILED JAN-25, 19H- 1,272,168.

Patented July 9, 1918.

2 SHEETSSHEET l.

Q a 8140mm:

WW I Ws 0 A. YOUNGREN. NET AND CABLE CUTTING ATTACHMENT FOR SUBMARINE BOATS.

APPUCATIDN FILED JAN. 25, 9|?- 1,272, 1 68. Patented July 9, 1918 2 SHEETS-SHEET 2.

' UNITED STATES PATENT orrrcn.

OSCAR A. YOUNGREN, or new YORK, N. Y.

- NET AND CABLE CUTTING ATTACHMENT FOR SUIBMARINE BOATS.

To all whom it may concern Be it known that I, OSCAR A. YoUNcREN, a citizen of the United States, residing at New York, New York county, and State of New'York, have invented and discovered certain new and useful Improvements in Net and Cable Cutting Attachments for Submarine Boats, of which the following is a specification.

My said invention consists in an approved apparatus for attachment to, or be made a part of, a submarine boat, whereby such a boat is equipped for cutting nets and cables, which may be spread to catch the same, or stop, or interfere with its operations under water. All this will be hereinafter more fully described and claimed.

Referring to the accompanying drawings, which are made a. part hereof, and on whichsimilar reference characters indicate similar Figure 1 is a side elevation of a submarine boat equipped with my said apparatus,

Fig. 2 a front elevation of a boat as it appears when equipped with my said invention,

Fig. 3 a view, on an enlarged scale, of a section of the apparatus showing the parts in the position they occupy when the cutters are open, a

' Fig. 4 a similar view showing theparts in the position they occupy when the cutters are closed, and

Figs. 5, 6, 7, 8 and 9 are detail views illustrating parts of the apparatus on an enlarged scale.

In said drawings the portions marked A represent the hull of the submarine, a

'i'ding structure or cylinder depending from the deck thereof, 0 a power shaft and D a pitman rod.

These parts are of any appropriate type and construction and need no special description except incidentally in describing the operative parts comprising the invention.

The apparatus consists essentially of a stationary bar 10 and a reciprocating bar 11 mounted in the center of the bow of the boat, in a vertical position and extending nearly to the keel of the boat and to a point a considerable distance above the deck of the boat, or a sufficient distance, so that the sweep of the knives will cut any net or wire that would contact with the boat at its bow. One.

such set of knives may be mounted on the Patented July 9, 1918.

Serial No. 144,488.

bow, and another set is preferably mounted to extend above the deck of the boat midway thereof (as shown in Fig. 1) or between the knives on the bow and any superstructure carried on the deck, being preferably located just in front of such superstructure to make sure that all obstructions will be cleared be fore the superstructure (as turrets and periscopes) reach them.

The second set of cutting apparatus, which I have indicated in Fig. 1 by the reference numeral 50, has a distinct, and in some instances, an important function in addition to the function of the cutting apparatus on the bow of the boat. For example, in cutting through a net, the cutting apparatus on the bow of the boat will cut an opening from the keel to a considerable distance above the deck, which will permit the boat to enter. However, as the boat increases in width from the bow toward the middle, it will be seen that its entrance into said opening will drag the top of the net downward and bring uncut portionsof the net down to where they will interfere with the turret or periscope and prevent the boats passage. The second set of cutting apparatus then comes into play and severs the net from the opening made by the first cutting apparatus to a point high enough to clear the structures above the deck. A bar or cable 51 may extend from the upper end of the frame of the second cutting apparatus 50 over the top of the turret and periscope in order to guard said parts against contact with any uncut strands of the net. It is understood, of course, that the construction and operation of the second cutting apparatus 50, is substantially identical with the construction and operation of the apparatus on the bow of the boat, and a detailed description of the apparatus on the bow of the boat is therefore deemed sufiicient to enable the construction and operation of the second apparatus to be clearly understood.

While the mechanical structure of the device may be varied to suit the different conditions or types of boats, or other machines or engines the use of which may be aided by such an apparatus, the structure shown will serve to illustrate the scope and purpose of my invention.

The bars 10 and 11 are connected by interengaging slots 12 and pins 13, the bar 10 being preferably a heavy bar with a vertical way ,in which bar 11 is mounted to recipro in a bracket formed near the upper jendof the bar and is connected'bymeans of a" link 16 with the reciprocatingv bar 11. The

nk; t e ppe e d Q Pit an DI- Said pitnian' D works through a stuffing box, or other appropriate closure-imember 1'8 cene trally of the guide B, and carries a crosshead '19, which engages with said guide B- for guidingthe pitmanl A crank wheel 20 is mounted on a shaft 21 and geared to a pinion22 on powershaft C. Said crank Wheel is connected by a crank pin 23 wi-th the lower end of pitman D. The power shaft C is driven by a special motorprovided:

' for the purpose, or may be driven by.- the] engine, or motor, used for. driving the boat, as found-most advantageous. 7

The guide B forthe cross-head 19 v may, be

formed by dependingb'rackets, withrwhichz the ends of the cross-headengagje, or of any"v I suitable construction, as will bei readily understood, and many other ,modifications' in details 'may be made within the scope of myinvention;

Each of the bars 10 and llare armed with teeth of the form bestillustrated in, F:igs.

5 to 9 inclusive. These teeth are each formed,

with. interlocking bases and securely riveted in recesses formed in the faces of; the re. spective bars." They, are also of thicl-z-.;heavy steel hardened and beveled from their outer: faces toward a central point,the adjacent faces of the teeth being-flat toradapt them to lie in close contact with each other.; The, horizontal edges of said teeth, are sharpened to adapt them to cut cables and WiIQSwZtIlCl the tapered points are preferably notched; as best illustratedin Figs. 8; and 91;to en able them to catch the strands of wirecom posingnets, V 7 i In operation the .crankwheel 20is1dri'ven through. thefgearpconnectiong before deerates to reciprocate.thepitman D'and this, through the lever :14, reciprocates'the bar 11 carrying the teeth :up and-down sothat the cutting edges thereonmeet thecutting edges of the corresponding teeth of the bar :10; The pointed ends of the teeth receive and guide the wires of the net or cable to between the cuttingedgesof the reciprocating knives and the cutting edges of; the stationary knives, and because Iof. the powerful structure thesefhnives operate to' sever Ethe wires, and thus remove; the; obstruction to the passage .of the boat. Y In the caseofmets composedof small wires, orof a-mesh that would not ordina'rily- ,pass ov'erthe' cutting teeth to between the cutting, edges, 7 thereof, the notches in the .edgeswill catchithelwijres and the meshes of: the met: so; that theIW-ires will severed "It is understood,--of"course, that the strucp V ture must be, made of sufiicient strength and opposite end o-f'lev'er 14c i'sco'nnectedb'y a rigidity to withstand "the work required of i it, and also that the notches n in the pointed edges of the teeth should be made, as--illustrated, with thegangle of the notch positioned to catch the wires of the net and drag them either up ward or. downward to break or sev-erthem.-, Theangle of the short face of the. notch, as illustrated; is practically; at, rightaangl'es, with the main faceoftheedge, while, theother faceof-theenotchis at-a,

much longer angle, th 1s construction ing the result: desired. 7

At the stern of the boat and iadvjacentto; 5

its keel arealso providedguardbars 55 supported by brackets 56,, which extend underthe propeller 5w7 and the rudder;;58, a d

guard said. parts lfrombecoming entangledi with strands of wires ornets as the boat passing over: them, or through. an 1 opening Wlllbe understood that it mayibeappliedfinl tating the reception 5 of r the wire; and, insure almost an iden,t'ical -manner to ,other motor 'driven machines, such as those now corn- 4 l mpnlytermed tanksflbein linotor dr fortifications.- Such a f tanlg so; equipped.

would be able to make its way through any;

charaot'er of-wire obstructions, and its prog- 1 vehicles armered and fitted; for. ppgrq ting agam st wlre guarded trenches tand -simil ar ress thereby much. facilitated; In wall cases', 4

the @Pe gp e i sf-Qr 1 e -a ?e1 cated almost Wholly within the machine and l thus v protectedv from danger. It willj-thusgbe understood, that a in, ,thgplaims I intend ,to

cover the application of my invention o all meter e y nma hines e 'rmay find" :i

m l ymentz dva te een I Havlng thus fully described mytsaidiin secure Paten is -c v l T e w mbuina e .Iw {a met v n m ine Seth a a ubmar ne at'pf; am tlng apparatus mounted on the front gthere'w' f, c n i t l we e ti lly. ecip o ati g kn ves extending from:v I a f; point approximately even with; its; bottom to a pointg aboye the top and, fa; second. cut-ting apparatus mounted in line with and in advance of the turret of the Jooat and extending from} the deck e e reint bw f h -e p-; f 'iihe-, fil s n efi d: u eneapparat s mean (f r uid n g es a i se b tw i-t e ive ad t e e e p oeatie s i i nives to ute Q PL -netss bstan ia ly me set forth. 7, I p a I A, q'm h neeq ipreevw i a s t Qf t a ut-t g.epnerat ses idi npera ss mrir sy 5s eidave tiq l.e ameente eon.the

front and top of the machine and armed with a series of projecting knives spaced a distance apart and formed with horizontal cutting edges and pointed outer ends, a reciprocating bar mounted to reciprocate alongside said stationary bar and carrying complementary knives, and means for reciprocating said bar, substantially as set forth.

3. A submarine provided with a double set of wire cutting apparatus each comprising a vertical bar mounted on the bow and deck of'said'boat and formed with a vertical way therein and also provided with a series of knives projecting horizontally therefrom and formed with horizontal cutting edges and tapered points, a bar mounted to reciprocate in thg way formed in said stationary bar and also provided with knives corresponding to the knives on the stationary bar, and means for reciprocating said bar, substantially as set fort I 4. A double set of wire cutting apparatus for submarine boats comprising vertical bars mounted on the bow and deck of the boat and entirely traversing said bow and to above the deck of the boat and extending from the deck to a point above the highest structure of said boat, horizontally projecting knives mounted on said bars and arranged to guide the wires between the cutting edges thereof, and means for reciprocating said knives, substantially as set forth.

5. A wire cutting apparatus for moving machines comprising reciprocating knives mounted on the front and top of the machine, said knives being formed with points apparatus for moving machines having horizontal cutting edges and tapered points with notched upper edges, substantially as set forth.

In a submarine boat provided with a vertically arranged cutting apparatus on its bow extending from the keel to a point above the deck, and with a second cutting apparatus adjacent to the superstructure eXte11ding above the deck midway thereof, and means for operating said cutting apparatus, substantially as set forth.

9. A submarine boat provided with a cutting apparatus on its bow adapted to cut an opening through a net arranged to catch the same, and with another cutting apparatus arranged in front of any superstructure extending above the deck, and arranged to out an enlarged opening to clear said superstrcture, and means for operating said cutting apparatus, substantially as set forth.

In witness whereof, I have hereunto set my hand and seal at New York, New York, this 8th day of January, A. D, nineteen hundred and seventeen.

OSCAR A. YOUNGREN. [L. s.]

Witnesses E. W. BRADFORD, L. vc 1\ KERINKY.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, I). 0." a 7 

